Pith Number

pith:NSSG2Y3R

pith:2010:NSSG2Y3R35WCRHE3QPULDQMATS

not attested not anchored not stored refs pending

Positive area and inaccessible fixed points for hedgehogs

Kingshook Biswas

arxiv:1010.4496 v4 · 2010-10-21 · math.CV · math.DS

Open paper page JSON Open Graph Bundle Merged state Verified badge What is a Pith Number?

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{NSSG2Y3R35WCRHE3QPULDQMATS}

Prints a linked badge after your title and injects PDF metadata. Compiles on arXiv. Learn more · Embed verified badge

Record completeness

1 Bitcoin timestamp

2 Internet Archive

3 Author claim open · sign in to claim

4 Citations open

5 Replications open

✓ Portable graph bundle live · download bundle · merged state

The bundle contains the canonical record plus signed events. A mirror can host it anywhere and recompute the same current state with the deterministic merge algorithm.

Receipt and verification

First computed	2026-05-17T23:53:36.841304Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

6ca46d6371df6c289c9b83e8b1c1809c8a1b1b1e1c508631e28cbb2f74b1f189

Aliases

arxiv: 1010.4496 · arxiv_version: 1010.4496v4 · doi: 10.48550/arxiv.1010.4496 · pith_short_12: NSSG2Y3R35WC · pith_short_16: NSSG2Y3R35WCRHE3 · pith_short_8: NSSG2Y3R

Agent API

Resolver JSON Graph JSON Events JSON Schema Signing key

Verify this Pith Number yourself

curl -sH 'Accept: application/ld+json' https://pith.science/pith/NSSG2Y3R35WCRHE3QPULDQMATS \
  | jq -c '.canonical_record' \
  | python3 -c "import sys,json,hashlib; b=json.dumps(json.loads(sys.stdin.read()), sort_keys=True, separators=(',',':'), ensure_ascii=False).encode(); print(hashlib.sha256(b).hexdigest())"
# expect: 6ca46d6371df6c289c9b83e8b1c1809c8a1b1b1e1c508631e28cbb2f74b1f189

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "54f88f7ba7c9a68d44841b1bd88e401dacee350e5e15e4598b82e005e8c00f6e",
    "cross_cats_sorted": [
      "math.DS"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.CV",
    "submitted_at": "2010-10-21T15:27:27Z",
    "title_canon_sha256": "2b5272750894f0bfb2374dbeb621af0faf2696f2654dbc92c391484f799e4cc3"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1010.4496",
    "kind": "arxiv",
    "version": 4
  }
}